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August 31, 2026 6 min read
Full manual for the SECO-LARM ENFORCER PR-3123-PQ / PR-3125-PQ Stand-Alone / Wiegand Proximity Reader, covering wiring, installation, and complete programming instructions.
Manual for the SECO-LARM ENFORCER® PR-3123-PQ / PR-3125-PQ Stand-Alone / Wiegand Proximity Reader — a weatherproof (IP66) access control proximity card reader supporting up to 1,000 users, with standalone relay control or Wiegand controller/reader modes.
| Color | Function | Description |
|---|---|---|
| Red | Power (+) | Connect to +12VDC power supply |
| Black | Ground (–) | Connect to Ground |
| Yellow | Egress Input (N.O.) | Pushbutton contact to ground; press to activate output |
| Brown | Door Sensor Input | Magnetic contact/door sensor (ground if unused) |
| Blue | Output N.O. | NO/NC/COM relay output, max 2A@12VDC. N.O. for fail-secure lock, N.C. for fail-safe lock |
| Purple | Output COM | |
| Orange | Output N.C. | |
| Gray | Alarm Output | Transistor ground output, max 2.5A@12VDC |
| Green | Data 0 | Wiegand controller connection |
| White | Data 1 |
Note: For DC-powered electric strikes, connect the included diode as close as possible and in parallel with the strike, to absorb electromagnetic interference. Do not connect a diode when using electromagnetic locks or AC-powered strikes.
| Spec | PR-3123-PQ | PR-3125-PQ |
|---|---|---|
| Operating voltage | 9~24 VDC | |
| Standby / Active current | 30mA@12VDC / 90mA@12VDC max | |
| Outputs | Form C: 2A@12VDC; Alarm: 2.5A@12VDC; Wiegand: 26~37 bits | |
| Wiegand input | 26~37 bits, PIN input 4/8/10 bits | |
| Card type | 125kHz EM | |
| Operating temperature | -40° to 140°F (-40° to 60°C) | |
| Operating humidity | 10~98% non-condensing | |
| Dimensions | 1⅞"x4¾"x1⅙3⁄16" (48x120x20mm) | 2&frac{15}{16}"x4¾"x1&frac{3}{16}" (75x120x20mm) |
| Weight | 4.4 oz (125g) | 6.5 oz (185g) |
| Status | Sound | LED |
|---|---|---|
| Power on / standby | — | Red steady |
| Base programming mode | 1 beep | Red flashing |
| Function programming mode | 1 beep | Orange steady |
| Exit programming mode | 1 beep | Red steady |
| Successful operation | 1 beep | Green flash once |
| Unsuccessful operation | 3 beeps | Red flashes 3 times |
| Built-in alarm | Rapid beeping | Red flashing rapidly |
Deactivate the built-in alarm by presenting a valid card.
Programming is done via the included infrared programmer's keypad, or via Master Add/Delete Cards for quick card enrollment. Default master programming code is 123456 (should be changed on first use). Enter base programming mode with the master code, then a function code enters that function's programming mode (LED turns steady orange).
| Code | Function | Default |
|---|---|---|
| 0 | Master programming code | 123456 (6 digits) |
| 1 | Add user/duress cards | None — must be programmed |
| 2 | Delete user/duress cards | None |
| 3 | Output mode/time | Momentary, 5 sec |
| 4 | Access mode / security level | Single card |
| 5 | External alarm/time | 1 minute |
| 6 | Wrong-card lockout/alarm | Lockout disabled |
| 7 | Notification sounds/LED; operation mode | Both ON; stand-alone/controller mode |
| 8 | Wiegand output/input format | 26 bits, 4-bit PIN |
| 9 | Two-door interlock mode; duplicate users to another reader | Interlock OFF |
Cards can be added individually by reading them, individually by typing printed card numbers, or in a large batch (up to 998 cards in consecutive order, taking up to 2 minutes) — useful for initial setup. The Master Add Card provides a shortcut into add-card mode without needing the master code.
Duress cards are added the same way as regular users but must be explicitly assigned to User ID 998 or 999. When triggered, the duress alarm sounds for the programmed alarm duration and cannot be silenced early; if a regular user card is used while the duress alarm sounds, the alarm continues and the timer restarts.
Delete individually by User ID or by reading/entering the card number, or use the Master Delete Card for quick deletion outside programming mode. To wipe all users while keeping the reader's configuration, use function code 2 followed by the master programming code. Duress IDs cannot be deleted with a delete card — only by their specific ID.
The relay can be set to toggle mode (starts on card presentation, stops on next presentation) or timed mode (triggers for 0.5–99 seconds, default 5 seconds, then auto-turns off).
Present the proximity card to activate the relay. One beep sounds (if enabled) and the LED turns green when accepted. Presenting a card also silences most alarms (except duress alarms).
Two readers, each on separate doors with their own locks and egress buttons, can be wired so that while one door is open, the other cannot be unlocked. Enable via function code 9 on each unit (disabled by default). See the downloadable PDF for the full interlock wiring diagram.
Up to 10 additional readers can be daisy-chained (matching wire colors) to receive a full copy of user data from a source reader (~3 minutes for 1,000 users, overwriting existing data on the destination units). All readers must share the same master programming code.
Requires an egress button connection. Power off, hold the egress button while powering on, and continue holding ~10 seconds until 2 beeps sound and the LED turns orange. Release the button; the LED turns red after ~30 seconds when the reset completes. To also assign new Master Add/Delete cards, read two cards within 30 seconds of release (first becomes Master Add, second becomes Master Delete).
One (1) year warranty against defects in material and workmanship from date of sale, limited to repair or replacement at SECO-LARM's option. Void if damage results from misuse, abuse, neglect, unauthorized repair/alteration, or improper installation.
SECO-LARM U.S.A., Inc., 16842 Millikan Avenue, Irvine, CA 92606 — Phone: (949) 261-2999 / (800) 662-0800, www.seco-larm.com, sales@seco-larm.com. FCC ID: K4E2612SPQ.
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